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4.2 Exploration, example 3

Directions

For examples #1-4, visually find the line of reflection and write its equation in the space provided. After, confirm your answer by doing the following:
  1. Use the line tool to construct the line of reflection on the graph
  2. Use the polygon tool to trace over the pre-image
  3. Use the reflection tool to reflect your polygon over the line
After, complete the table provided and write a coordinate rule for the reflection.

Example #3

Equation of the line of reflection

A (4,-7) B (2,-3) C (9,-1)
A’   B’   C’  

Write a coordinate rule for this transformation.

Write down this rule in your notebook. You're going to need it for homework and future assessments!